A tri‐ing reaction: An asymmetricDiels–Alder cycloaddition of δ,δ‐disubstituted 2,4‐dienones is possible through the trienaminecatalysis of cinchona‐based primary amines (see scheme). An array of electron‐deficient dienophiles, such as N‐substituted maleimides and 3‐alkenyl oxindoles, were tolerated, and multifunctional cyclohexene derivatives were obtained in excellent stereoselectivity and with